Exterior surface configuration of a radiator grille



FIG. 1 is a front view of an exterior surface configuration of a radiator grille according to our novel design; and,

FIG. 2 is a perspective view from the front and left side of an exterior surface configuration of a radiator grille according to our novel design.

The broken lines shown in all drawing views are for illustrative purposes only and form no part of the claimed design. The rear view is flat and unornamented and not visible in use. 

The ornamental design for an exterior surface configuration of a radiator grille, as shown and described. 